Ultra-wideband optical perfect absorber and preparation method thereof

An ultra-broadband and absorber technology, applied in the optical field, can solve the problems of narrow wavelength range, inability to further expand the absorption bandwidth, difficult multi-band optical resonance absorption, etc., to achieve the effect of ultra-broadband and perfect optical absorption
CN107797167AInactive Publication Date: 2018-03-13JIANGXI NORMAL UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGXI NORMAL UNIV
Publication Date
2018-03-13
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses an ultra-wideband optical perfect absorber and a preparation method thereof. The ultra-wideband optical perfect absorber comprises a substrate, the substrate is provided with atitanium nitride film layer, a dielectric film layer and a titanium nitride-titanium dioxide structural layer in sequence from bottom to top, the titanium nitride-titanium dioxide structural layer comprises a titanium nitride particle array and a titanium dioxide particle array, the titanium nitride particle array is arranged on the upper surface of the dielectric film layer, and the titanium dioxide particle array is arranged on the upper surface of the titanium dioxide particle array. Ultra-wideband absorption with the coverage of ultraviolet-visible-near-infrared wavebands is realized withthe combination of the titanium nitride particle array and the titanium dioxide particle array through good absorption effect of lights with different wavelengths by titanium nitride and titanium dioxide materials.
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Description

technical field

[0001] The invention relates to the field of optics, in particular to an ultra-broadband optical perfect absorber and a preparation method thereof. Background technique

[0002] Since 2008, the research on electromagnetic wave perfect absorber or optical perfect absorber has received extensive attention from researchers at home and abroad. In the structure, the electromagnetic resonance phenomenon realizes that the structure has neither reflection (reflectance close to 0) nor transmission (transmittance 0) at the resonant wavelength, so that according to absorption A=1-R-T (where A represents the absorption rate, R Represents the reflectivity, T represents the transmittance) definition can get the perfect absorption of the absorptivity A close to 100%, in the three-layer electromagnetic resonance structure system or metamaterial system based on metal-dielectric (or insulating material)-metal realizes from the microwave Perfect absorption response from freque...

Claims

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